leave someone to their own devices
US /liːv ˈsʌm.wʌn tuː ðer oʊn dɪˈvaɪsɪz/
UK /liːv ˈsʌm.wʌn tuː ðer oʊn dɪˈvaɪsɪz/

1.
내버려두다, 자유롭게 하다
to allow someone to do what they want, without telling them what to do or trying to control them
:
•
If you leave him to his own devices, he'll probably just play video games all day.
그를 내버려두면 아마 하루 종일 비디오 게임만 할 거야.
•
The children were left to their own devices while their parents were out.
부모님이 외출한 동안 아이들은 내버려두었다.